This learning resource focuses on the basic components of a Lithium atom, emphasizing the role of protons in defining the identity of chemical elements. Through a hands-on activity, students will sketch a model of a Lithium-7 atom, identifying and placing 3 protons and 4 neutrons in the nucleus, while positioning 3 electrons in orbit around the nucleus. The resource encourages students to recall prior knowledge about atomic structure, and culminates in a reflection on the significance of protons in maintaining the identity of Lithium as an element.